biologiya fanidan taqdimot: gullarning changlanishi

презентация powerpoint toshkent shahar yunusobod tumani 259-umumta`lim maktabi biologiya fani o`qituvchisi soliyeva jamilaxon rahmonjonovnaning 6-sinf biologiya fanidan taqdimoti mavzu: gullarning changlanishi changdonda yetilgan changlarning urug`chi tumshuqchasiga tushushiga changlanish deyiladi changlanish 3 xil yo`l bilan amalga oshadi: chetdan changlanish o`z-o`zidan changlanish sun`iy changlanish changdon urug`chaning (1) tumshuqchasi (2) changlanish jarayoni: 1-o`zidan changlanish 2-chetdan changlanish gullarning chetdan changlanishi yetilib yorilgan changdondan chiqqan changning hasharotlar, shamol, suv, qushlar va o`zga vositalar yordamida boshqa gulning tumshuqchasiga tushushiga chetdan changlanish deyiladi gul changining hasharotlar yordamida guldan gulga o`tishi hasharotlar yor...

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